World's Most Evil Killers

In 2007, single mother of three Paige Birgfeld went missing.

In 1999 and 2000, John Eric Armstrong cruised the streets of Detroit, Michigan looking for sex workers.

Steven Dean Gordon and Frank Cano murdered at least four sex workers in California between 2012 and 2013.

In January 1973, 20-year-old mother of one Dawn Magyar vanished while on a shopping trip in Owosso, Michigan.

Randy Kraft was a well-spoken, well-respected computer expert...and a prolific serial killer.

Richard Kuklinski claimed to have murdered over 100 people for New York and New Jersey's crime families.

Over a 25-year career of murder, Richard Biegenwald killed at least six people.

Police in Aurora, Colorado found the body of a young man in in his own home with a bullet wound to the head.

Billy Mansfield Jr. moved between Florida and Michigan, targeting vulnerable women and girls.

Wayne Adam Ford is an American serial killer who strangled and dismembered three of his four victims.

When Carol Jarvis disappeared, her husband told friends and family that she'd simply gone on a little holiday.

Jane Longhurst vanished after making a plan to go swimming with her friend's boyfriend.

Jordan Monaghan killed his 24-day-old daughter Ruby on New Year's Day in January 2013.

In April 1997, 27-year-old Rachel McGrath was stabbed to death by an unknown attacker in a car park.

Less than 20 minutes after dropping her children off at school, Rachel O'Reilly was murdered.

When Mary Gough was found dead in her family home, her husband Colin Whelan appeared shocked.

In March 2005, the garda’ recovered human body parts from the Royal Canal in Dublin.

Catherine Nevin reported a break-in and violent attack at her pub, which left her husband dead.

Dublin man Eric Locke refused to accept it when Sonia Blount, a mother of one, ended their relationship.